SVC装置TCR电抗器磁场影响分析及对策

Influence Analysis and Countermeasures of TCR Reactor Magnetic Field of SVC Device

研究解决±800kV楚雄换流站SVC装置TCR电抗器运行产生的磁场严重影响周围设备的安全运行问题。通过采取地网解环和将电抗器由1.685 m抬高至3.928 m的措施进行改造,并对实施效果进行分析,发现电缆屏蔽层的感应电流未能达到小于9A的目标值。利用磁场强度实测值进行电抗器高度测算,并根据理论值计算进行验证,得出TCR电抗器需抬高至6.25m才能达到预期目的。

In order to solve the serious influence problem of the magnetic field to the security operation of devices nearby, which is generated by the operation of TCR reactors of SVC device in ＋800 kV Chuxiong converter station, modification measures have been taken including the ground grid decoupling and the increasing of reactor altitude from 1.685 m to 3.928 m. The implementation effect is analyzed and it is found that the induced current of the cable shield could not get the target value of less than 9 A. By the reactor altitude estimation based on the magnetic field strength test results and the verification based on the theoretic calculation, it is proposed that the TCR reactor altitude should be up to 6.25 m to reach the expected purpose.